linux-kernel - [tip: x86/bugs] x86/srso: Move retbleed IBPB check into existing 'has

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Message-ID: <169780183877.3135.16167476121418163828.tip-bot2@tip-bot2>
Date:   Fri, 20 Oct 2023 11:37:18 -0000
From:   "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "Borislav Petkov (AMD)" <bp@...en8.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/bugs] x86/srso: Move retbleed IBPB check into existing
 'has_microcode' code block

The following commit has been merged into the x86/bugs branch of tip:

Commit-ID:     351236947a45a512c517153bbe109fe868d05e6d
Gitweb:        https://git.kernel.org/tip/351236947a45a512c517153bbe109fe868d05e6d
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Mon, 04 Sep 2023 22:04:59 -07:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Fri, 20 Oct 2023 12:29:25 +02:00

x86/srso: Move retbleed IBPB check into existing 'has_microcode' code block

Simplify the code flow a bit by moving the retbleed IBPB check into the
existing 'has_microcode' block.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Acked-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: https://lore.kernel.org/r/0a22b86b1f6b07f9046a9ab763fc0e0d1b7a91d4.1693889988.git.jpoimboe@kernel.org
---
 arch/x86/kernel/cpu/bugs.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 941ac94..6b443f0 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -2430,10 +2430,8 @@ static void __init srso_select_mitigation(void)
 			setup_force_cpu_cap(X86_FEATURE_SRSO_NO);
 			return;
 		}
-	}
 
-	if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
-		if (has_microcode) {
+		if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
 			srso_mitigation = SRSO_MITIGATION_IBPB;
 			goto out;
 		}